Image robson1@arizona.edu Phone 520-621-6892 Profile Site UA Profile Office MATH-505 Charles Robson he, him, his Instructor, Mathematics Office Hours* (Spring 2025):Mon01:00 PM - 02:00 PMTue01:30 PM - 02:30 PMWed01:00 PM - 02:00 PMThu02:00 PM - 03:00 PM* See your D2L Course Home page for details.